Proverbs 4:23

²¹ Let them not depart from thine eyes; keep them in the midst of thine heart.

²² For they are life unto those that find them, and health to all their flesh.

Keep thy heart with all diligence; for out of it are the issues of life.

²⁴ Put away from thee a froward mouth, and perverse lips put far from thee.

²⁵ Let thine eyes look right on, and let thine eyelids look straight before thee.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: Guard your heart with all diligence, for from it flow springs of life.
KJV: Keep thy heart with all diligence; for out of it are the issues of life.
WEB: Keep your heart with all diligence, for out of it is the wellspring of life.
ASV: Keep thy heart with all diligence; For out of it are the issues of life.
DARBY: Keep thy heart more than anything that is guarded; for out of it are the issues of life.
BLB: With all diligence, guard your heart, for from it [are] the outgoings of life.

ÅB: Bevar ditt hjerte fremfor alt det som bevares; for livet utgår fra det.
OTB: Vokt ditt hjerte med all årvåkenhet, for det er livets kilde.
B1930: Bevar ditt hjerte fremfor alt det som bevares; for livet utgår fra det.

Luke 6:45
A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.
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Matthew 12:34–35
O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.
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Mark 7:21–23
For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders,
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Psalms 139:23–24
Search me, O God, and know my heart: try me, and know my thoughts:
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Proverbs 13:3
He that keepeth his mouth keepeth his life: but he that openeth wide his lips shall have destruction.
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Jeremiah 17:9
The heart is deceitful above all things, and desperately wicked: who can know it?
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Matthew 15:19
For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:
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Proverbs 23:19
Hear thou, my son, and be wise, and guide thine heart in the way.
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